DATAREST-307 - Fixed handling of root resource on Tomcat.

We're now using a single slash to make sure the downstream method mapping works as expected.
DATAREST-306 - Updated changelog.
DATAREST-306 - Prepare 2.1 GA.
DATAREST-306 - Release version 2.1.0.RELEASE.
DATAREST-306 - Prepare next development iteration.
DATAREST-306 - After release cleanups.
Create Json Filters and send pure Json